Datasheet

LMV7271
SNOSA56H –FEBRUARY 2003–REVISED FEBRUARY 2013 www.ti.com
Figure 29. Inverting Comparator with Hysteresis
Non-Inverting Comparator with Hysteresis
A non-inverting comparator with hysteresis requires a two resistor network, and a voltage reference (V
REF
) at the
inverting input (Figure 30). When V
IN
is low, the output is also low. For the output to switch from low to high, V
IN
must rise up to V
IN1
, where V
IN1
is calculated by
(4)
When V
IN
is high, the output is also high. To make the comparator switch back to its low state, V
IN
must equal
V
REF
before V
A
will again equal V
REF
. V
IN
can be calculated by:
(5)
The hysteresis of this circuit is the difference between V
IN1
and V
IN2
.
ΔV
IN
= V
CC
R
1
/R
2
(6)
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